Connected: An Internet Encyclopedia
RFC 1122 - 3.2.2.4 Time Exceeded: RFC-792

Top: Connected: An Internet Encyclopedia
Up: Requests For Comments
Up: RFC 1122
Up: 3. INTERNET LAYER PROTOCOLS
Up: 3.2 PROTOCOL WALK-THROUGH
Up: 3.2.2 Internet Control Message Protocol -- ICMP
Prev: 3.2.2.3 Source Quench: RFC-792
Next: 3.2.2.5 Parameter Problem: RFC-792

### 3.2.2.4 Time Exceeded: RFC-792

An incoming Time Exceeded message MUST be passed to the transport layer.

DISCUSSION:

  A gateway will send a Time Exceeded Code 0 (In Transit) message when it discards a datagram due to an expired TTL field. This indicates either a gateway routing loop or too small an initial TTL value.

  A host may receive a Time Exceeded Code 1 (Reassembly Timeout) message from a destination host that has timed out and discarded an incomplete datagram; see Section 3.3.2 below. In the future, receipt of this message might be part of some "MTU discovery" procedure, to discover the maximum datagram size that can be sent on the path without fragmentation.

Next: 3.2.2.5 Parameter Problem: RFC-792

Connected: An Internet Encyclopedia
RFC 1122 - 3.2.2.4 Time Exceeded: RFC-792